It's hard to believe, but the iPhone turns 7 years old this Saturday. So it seemed only right to pay tribute to the device that changed the direction of the smartphone industry. It was expensive, lacked some key features, but overcame those hurdles thanks to a minimal hardware and software design. 

It's hard to imagine the market without an iPhone these days. Since 2007, the brand has gone on to have incredible success, selling millions of devices every month. Its nearest competitor is the Galaxy S series, which still doesn't quite match up to the iPhone's volume of sales.